Malicious PDF — malware analysis report

Static analysis result for SHA-256 28943eff3d1be786…

MALICIOUS

PDF

35.6 KB Created: 2021-06-18 04:27:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0a862e996fad9fed4b9645f4b1be09af SHA-1: 7e69a8b90c39829d4c34dfedf82503f3e4d03cc5 SHA-256: 28943eff3d1be78628fe7f7356c7345d649e4537a591752d4edebd2668db9881
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded URLs and references to game hacks and cheats, specifically for Roblox. The primary URL, http://netcdn.co/app/431946152/advhaa-roblox-free-game-hack, suggests a download lure. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent. The presence of download buttons and QR code lures further supports a social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.co/app/431946152/advhaa-roblox-free-game-hack
    • https://elearning.man1tuban.sch.id/__statics/gudangsoal/files/minecraft-on-computer-free_GM479516143.pdf
    • https://elearning.man1tuban.sch.id/__statics/gudangsoal/files/free-clothing-roblox-group_GM431946152.pdf
    • https://elearning.man1tuban.sch.id/__statics/gudangsoal/files/free-ninja-legends-fan-groups-roblox_GM431946152.pdf
    • https://elearning.man1tuban.sch.id/__statics/gudangsoal/files/how-to-hack-robux-with-cheat-engine-61_GM431946152.pdf
    • https://elearning.man1tuban.sch.id/__statics/gudangsoal/files/free-spins-coins-coin-master_GM406889139.pdf
    • https://elearning.man1tuban.sch.id/__statics/gudangsoal/files/roblox-free-download-no-app-store_GM431946152.pdf
    • https://elearning.man1tuban.sch.id/__statics/gudangsoal/files/roblox-azure-mines-cheat-scripts_GM431946152.pdf
    • https://elearning.man1tuban.sch.id/__statics/gudangsoal/files/robux-hack-generator-without-human-verification_GM431946152.pdf
    • https://elearning.man1tuban.sch.id/__statics/gudangsoal/files/where-to-get-free-robux-on-roblox_GM431946152.pdf
    • https://elearning.man1tuban.sch.id/__statics/gudangsoal/files/how-do-you-get-a-free-dominus-in-roblox_GM431946152.pdf
    • https://elearning.man1tuban.sch.id/__statics/gudangsoal/files/get-free-robux-no-human-verification-2021_GM431946152.pdf
    • https://elearning.man1tuban.sch.id/__statics/gudangsoal/files/free-robux-on-ipad-and-withoutb-downloading-anything_GM431946152.pdf
    • https://elearning.man1tuban.sch.id/__statics/gudangsoal/files/rbx-free-robux_GM431946152.pdf
    • https://elearning.man1tuban.sch.id/__statics/gudangsoal/files/25-000-free-robux_GM431946152.pdf
    • https://elearning.man1tuban.sch.id/__statics/gudangsoal/files/top3k-roblox-hack_GM431946152.pdf
    • https://elearning.man1tuban.sch.id/__statics/gudangsoal/files/free-roblox-for-6-year-old_GM431946152.pdf
    • https://elearning.man1tuban.sch.id/__statics/gudangsoal/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdf
    • https://elearning.man1tuban.sch.id/__statics/gudangsoal/files/easy-no-survey-free-robux_GM431946152.pdf
    • https://elearning.man1tuban.sch.id/__statics/gudangsoal/files/minecraft-bedrock-edition-pc-download-free_GM479516143.pdf
    • https://elearning.man1tuban.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-dominus_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033fb.bin
ffd023797875d0b8ff954387a6bbeaf4f4533cec4d18c4aa611d9b4e9dc5e14d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33FB 22420 bytes
font_01_sfnt_off00006628.bin
177dc5ae7c79514cd86cc0ec4eca6d783918fa92e882c31bf2c54beefb8636d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6628 19104 bytes

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